From 1926 to 1938, Horrell was an assistant coach for the UCLA Bruins.[1] He then served as the head coach from 1939 to 1944, compiling a 24–31–6 record. His 1942 UCLA Bruins team lost to Georgia in the 1943 Rose Bowl. He was the first coach to lead a UCLA team to defeat the rival USC Trojans. It was UCLA's first football victory in the UCLA–USC rivalry.

1.
American football
–
The offense must advance at least ten yards in four downs, or plays, or else they turn over the football to the opposing team, if they succeed, they are given a new set of four downs. Points are primarily scored by advancing the ball into the teams end zone for a touchdown or kicking the ball through the opponents goalposts for a field goal. The team with the most points at the end of a game wins, American football evolved in the United States, originating from the sports of association football and rugby football. The first game of American football was played on November 6,1869, during the latter half of the 1870s, colleges playing association football switched to the Rugby Union code, which allowed carrying the ball. American football as a whole is the most popular sport in the United States, Professional football and college football are the most popular forms of the game, with the other major levels being high school and youth football. As of 2012, nearly 1.1 million high school athletes and 70,000 college athletes play the sport in the United States annually, almost all of them men, in the United States, American football is referred to as football. The term football was established in the rulebook for the 1876 college football season. The terms gridiron or American football are favored in English-speaking countries where other codes of football are popular, such as the United Kingdom, Ireland, New Zealand, American football evolved from the sports of association football and rugby football. What is considered to be the first American football game was played on November 6,1869 between Rutgers and Princeton, two college teams, the game was played between two teams of 25 players each and used a round ball that could not be picked up or carried. It could, however, be kicked or batted with the feet, hands, head or sides, Rutgers won the game 6 goals to 4. Collegiate play continued for years in which matches were played using the rules of the host school. Representatives of Yale, Columbia, Princeton and Rutgers met on October 19,1873 to create a set of rules for all schools to adhere to. Teams were set at 20 players each, and fields of 400 by 250 feet were specified, Harvard abstained from the conference, as they favored a rugby-style game that allowed running with the ball. An 1875 Harvard-Yale game played under rugby-style rules was observed by two impressed Princeton athletes and these players introduced the sport to Princeton, a feat the Professional Football Researchers Association compared to selling refrigerators to Eskimos. Princeton, Harvard, Yale and Columbia then agreed to play using a form of rugby union rules with a modified scoring system. These schools formed the Intercollegiate Football Association, although Yale did not join until 1879, the introduction of the snap resulted in unexpected consequences. Prior to the snap, the strategy had been to punt if a scrum resulted in bad field position, however, a group of Princeton players realized that, as the snap was uncontested, they now could hold the ball indefinitely to prevent their opponent from scoring. In 1881, both teams in a game between Yale-Princeton used this strategy to maintain their undefeated records, each team held the ball, gaining no ground, for an entire half, resulting in a 0-0 tie

2.
Beverly Hills, California
–
Beverly Hills is a city in Los Angeles County, California, United States, surrounded by the cities of Los Angeles and West Hollywood. By 2013, its population had grown to 34,658, sometimes referred to as 90210, one of its primary ZIP codes, it was home to many actors and celebrities throughout the 20th century. The city includes the Rodeo Drive shopping district and the Beverly Hills Oil Field, gaspar de Portolá arrived in the area that would later become Beverly Hills on August 3,1769, travelling along native trails which followed the present-day route of Wilshire Boulevard. The area was settled by Maria Rita Quinteros de Valdez and her husband in 1828 and they called their 4,500 acres of property the Rancho Rodeo de las Aguas. in 1854, she sold the ranch to Benjamin Davis Wilson and Henry Hancock. By the 1880s, the ranch had been subdivided into parcels of 75 acres and was being bought up by anglos from Los Angeles. Henry Hammel and Andrew H. Denker acquired most of it, at this point, the area was known as the Hammel and Denker Ranch. By 1888, Denker and Hammel were planning to build a town called Morocco on their holdings and they did not find enough to exploit commercially by the standards of the time, though. In 1906, therefore, they reorganized as the Rodeo Land and Water Company, renamed the property Beverly Hills, subdivided it, the development was named Beverly Hills after Beverly Farms in Beverly, Massachusetts and because of the hills in the area. The first house in the subdivision was built in 1907, although sales remained slow, Beverly Hills was one of many all-white planned communities started in the Los Angeles area around this time. Restrictive covenants prohibited non-whites from owning or renting property unless they were employed as servants by white residents and it was also forbidden to sell or rent property to Jews in Beverly Hills. Burton Green began construction on The Beverly Hills Hotel in 1911, the hotel was finished in 1912. The visitors drawn by the hotel were inclined to purchase land in Beverly Hills and that same year, the Rodeo Land and Water Company decided to separate its water business from its real estate business. The Beverly Hills Utility Commission was split off from the company and incorporated in September 1914, buying all of the utilities-related assets from the Rodeo Land. In 1919, Douglas Fairbanks and Mary Pickford bought land on Summit Drive and built a mansion, finished in 1921, the glamor associated with Fairbanks and Pickford as well as other movie stars who built mansions in the city contributed to its growing appeal. By the early 1920s the population of Beverly Hills had grown enough to make the water supply a political issue, in 1923 the usual solution, annexation to the city of Los Angeles, was proposed. There was considerable opposition to annexation among such famous residents as Pickford, Fairbanks, Will Rogers, the Beverly Hills Utility Commission, opposed to annexation as well, managed to force the city into a special election and the plan was defeated 337 to 507. In 1925, Beverly Hills approved an issue to buy 385 acres for a new campus for UCLA. The cities of Los Angeles, Santa Monica and Venice also issued bonds to pay for the new campus

3.
California Golden Bears football
–
The California Golden Bears football team is the college football team of the University of California, Berkeley. The team plays its games at California Memorial Stadium. Memorial Stadium was built to honor Berkeley alumni, students, and other Californians who died in World War I, Memorial Stadium was named one of the 40 best college football stadiums by the Sporting News. Football was first played on the Berkeley campus in 1882, albeit in a form that resembled rugby and it was not until 1886 that American football began play. It played its first annual rivalry game – known as The Big Game – against Stanford University in 1892 and this became one of oldest College rivalry games in the United States. Football was put on hiatus in 1906 when it was decided by the Theodore Roosevelt administration that American football was too dangerous a sport, Football returned for good in 1915 and Cal has fielded a team in every year since. The 1920s saw the first golden age of California football, as the Golden Bears went 50 straight games without a defeat from 1920 to 1925, as of 2010, this is the third-longest unbeaten streak in NCAA history. The 1920–1924 squads were so dominant that they were nicknamed The Wonder Teams and he is considered to be the greatest football coach in Golden Bears history. He is famous for his strategy of kick and wait for the breaks. Dying in 1925 with his University of California 10-year record of 74 wins,16 losses and 7 ties, during his time California won three NCAA recognized national titles, four Pacific Coast Conference championships and made three trips to the Rose Bowl. In 1921 it shutout Ohio State 28–0, in 1922 and while swimming in mud, it tied the huge underdog Washington & Jefferson College Presidents 0–0, for the sole tie in Rose Bowl history. One of the stars of this era was Harold Brick Muller, in 1960 the respected Helms Athletic Foundation crowned the 1920 Cal Bears as the greatest football team in American history. Andy Smith died shortly after the end of the 1925 season and his death was unexpected and traumatic for the team and the whole university. His replacement was his assistant coach Nibs Price, Price was first hired as a freshman coach in 1918. He recruited the dominant 1919 freshmen team that would become the core of the Wonder Team for the three years. In their first season without Smith, Cal had its first losing season since 1897, but by 1928, the team that was undefeated with six shutouts was invited to the Rose Bowl to play against Georgia Tech. While this team is considered to be one of the greats in Cal history and it has become the most famous moment in Rose Bowl history. In the second quarter, Californias defense forced a Georgia Tech fumble on their own 30-yard line, and the loose ball was scooped up by California center Roy Riegels

4.
UCLA Bruins football
–
The UCLA Bruins football program represents the University of California, Los Angeles in college football as members of the Pac-12 Conference at the NCAA Division I FBS level. The Bruins have enjoyed several periods of success in their history and their first major period of success came in the 1950s, under head coach Henry Russell Sanders. Sanders led the Bruins to the Coaches Poll national championship in 1954, in the 1980s and 1990s, during the tenure of Terry Donahue, the Bruins compiled a 151–74–8 record, including 13 bowl games and an NCAA record eight straight bowl wins. The program has produced 28 first round picks in the NFL Draft,30 consensus All-Americans, the UCLA Bruins main rival is the USC Trojans. Jim L. Mora is the current head coach, the Bruins were the Pac-12 Conference South Division champions for two years in a row and played Pac-12 Football Championship Games in both 2011 and 2012. The first football team fielded by UCLA took the field in 1919, the team was coached by Fred Cozens. That UCLA football team compiled a 2–6 record, UCLA did not participate in an athletic conference until 1920, so the 1919 football team played a schedule full of local high schools and other assorted teams. Cozens was UCLAs athletics director from 1919 to 1942, harry Trotter took over the young UCLA football program after Cozens stepped down after guiding the Bruins in their first season. Coach Trotters two wins were against Redlands and San Diego State, which did not join the SCIAC until 1926, Trotter left UCLA with a 2–13–1 record in three seasons. James J. Cline took over the Bruins football program as its head coach in 1923. Coach Clines two wins were against Loyola University and San Diego State, Cline was replaced after two seasons and a 2–10–3 record. William H. Spaulding came to UCLA from Minnesota in 1925, as the Bruins head coach, his overall record in fourteen seasons was 72–51–8. During his tenure in Los Angeles, Spaulding led the Bruins to their first bowl appearance and victory, also during Spauldings tenure, the Bruins left the SCIAC and joined the Pacific Coast Conference beginning in 1928. Spauldings 72 wins rank him among the best in head coaching victories in Bruin football history and he retired after a successful fourteen-season tenure ended after the 1938 season. Horrell was promoted to head coach following Spauldings retirement and his 1942 UCLA Bruins team lost to Georgia in the 1943 Rose Bowl. He was the first coach to lead a UCLA team to defeat rival USC and it was the first football victory in the UCLA-USC rivalry. The most notable player who played for Horrell at UCLA was Jackie Robinson, Horrells 1939 team compiled a 6–0–4 and his 1941 team posted a 5–5–1 record. With the exception of the 1942 season, the record of the Bruins during Horrells tenure outside the aforementioned seasons was 6–22–1

5.
College Football Hall of Fame
–
The College Football Hall of Fame is a hall of fame and museum devoted to college football. The National Football Foundation launched the Hall in 1951 to immortalize the players, from 1995 to 2012, the Hall was located in South Bend, Indiana. It was connected to a center and situated in the citys renovated downtown district,2 miles south of the University of Notre Dame campus. In August 2014, the College Football Hall of Fame and Chick-fil-A Fan Experience opened in downtown Atlanta, rutgers donated land near its football stadium, office space, and administrative support. In response, the Foundation moved its operations to New York City, when the New York Attorney Generals office began its own investigation, the foundation moved to Kings Mills, Ohio, where a building finally was constructed adjacent to Kings Island in 1978. The Hall opened with good attendance figures early on, but visitation dwindled dramatically as time went on, nearby Galbreath Field remained open as the home of Moeller High School football until 2003. A new building was opened in South Bend, Indiana on August 25,1995. Despite estimates that the South Bend location would more than 150,000 visitors a year, the Hall of Fame drew about 115,000 people the first year. In 2009, the National Football Foundation decided to move the College Football Hall of Fame to Atlanta, the possibility of moving the museum has been brought up in other cities, including Dallas, which had the financial backing of billionaire T. Boone Pickens. However, the National Football Foundation ultimately decided on Atlanta for the next site, the new $68.5 million museum opened on August 23,2014. It is located next to Centennial Olympic Park, which is near other attractions such as the Georgia Aquarium, the World of Coca-Cola, CNN Center, and the National Center for Civil and Human Rights. The Hall of Fame is located near the Georgia Institute of Technology of the ACC, the new building broke ground on January 28,2013. Sections of the architecture are reminiscent of a football in shape, the facility is 94,256 square feet and contains approximately 50,000 square feet of exhibit and event space, interactive displays and a 45-yard indoor football field. Atlanta Hall Management operates the College Football Hall of Fame, as of 2017, there are 987 players and 214 coaches enshrined in the College Football Hall of Fame, representing 306 schools. The National Football Foundation outlines specific criteria that may be used for evaluating a candidate for induction into the Hall of Fame. A player must have received major first team All-America recognition, a player becomes eligible for consideration 10 years after his last year of intercollegiate football played. Football achievements are considered first, but the record as a citizen is also weighed. Players must have played their last year of football within the last 50 years

6.
University of California, Berkeley
–
The University of California, Berkeley, is a public research university located in Berkeley, California. In 1960s, UC Berkeley was particularly noted for the Free Speech Movement as well as the Anti-Vietnam War Movement led by its students. S, Department of Energy, and is home to many world-renowned research institutes and organizations including Mathematical Sciences Research Institute and Space Sciences Laboratory. Faculty member J. R. Oppenheimer, the father of the atomic bomb, Lawrence Livermore Lab also discovered or co-discovered six chemical elements. The Academic Ranking of World Universities also ranks the University of California, Berkeley, third in the world overall, in 1866, the private College of California purchased the land comprising the current Berkeley campus. Ten faculty members and almost 40 students made up the new University of California when it opened in Oakland in 1869, billings was a trustee of the College of California and suggested that the college be named in honor of the Anglo-Irish philosopher George Berkeley. In 1870, Henry Durant, the founder of the College of California, with the completion of North and South Halls in 1873, the university relocated to its Berkeley location with 167 male and 22 female students and held its first classes. In 1905, the University Farm was established near Sacramento, ultimately becoming the University of California, by the 1920s, the number of campus buildings had grown substantially, and included twenty structures designed by architect John Galen Howard. Robert Gordon Sproul served as president from 1930 to 1958, by 1942, the American Council on Education ranked UC Berkeley second only to Harvard University in the number of distinguished departments. During World War II, following Glenn Seaborgs then-secret discovery of plutonium, UC Berkeley physics professor J. Robert Oppenheimer was named scientific head of the Manhattan Project in 1942. Along with the Lawrence Berkeley National Laboratory, Berkeley is now a partner in managing two other labs, Los Alamos National Laboratory and Lawrence Livermore National Laboratory, originally, military training was compulsory for male undergraduates, and Berkeley housed an armory for that purpose. In 1917, Berkeleys ROTC program was established, and its School of Military Aeronautics trained future pilots, including Jimmy Doolittle, both Robert McNamara and Frederick C. Weyand graduated from UC Berkeleys ROTC program, earning B. A. degrees in 1937 and 1938, in 1926, future fleet admiral Chester W. Nimitz established the first Naval Reserve Officers Training Corps unit at Berkeley. The Board of Regents ended compulsory military training at Berkeley in 1962, during the McCarthy era in 1949, the Board of Regents adopted an anti-communist loyalty oath. A number of faculty members objected and were dismissed, ten years passed before they were reinstated with back pay, in 1952, the University of California became an entity separate from the Berkeley campus. Each campus was given autonomy and its own Chancellor. Then-president Sproul assumed presidency of the entire University of California system, Berkeley gained a reputation for student activism in the 1960s with the Free Speech Movement of 1964 and opposition to the Vietnam War. In the highly publicized Peoples Park protest in 1969, students and the school conflicted over use of a plot of land, then governor of California Ronald Reagan called the Berkeley campus a haven for communist sympathizers, protesters, and sex deviants. Modern students at Berkeley are less active, with a greater percentage of moderates and conservatives

7.
University of California, Los Angeles
–
The University of California, Los Angeles is a public research university in the Westwood district of Los Angeles, California, United States. It became the Southern Branch of the University of California in 1919 and it offers 337 undergraduate and graduate degree programs in a wide range of disciplines. UCLA enrolls about 31,000 undergraduate and 13,000 graduate students, and had 119,000 applicants for Fall 2016, including transfer applicants, the university is organized into six undergraduate colleges, seven professional schools, and four professional health science schools. Fourteen Nobel laureates, three Fields Medalists, two Chief Scientists of the U. S. Air Force and three Turing Award winners have been faculty, researchers, or alumni, the university was elected to the Association of American Universities in 1974. The Times Higher Education World University Rankings for 2015–2016 ranked UCLA 16th in the world for academics, in 2015-2016, UCLA ranked 12th in the world by the Academic Ranking of World Universities and 31st in the 2016/17 QS World University Rankings. UCLA student-athletes compete as the Bruins in the Pac-12 Conference, the Bruins won 126 national championships, including 113 NCAA team championships, more than any other university. UCLA student-athletes, coaches and staff won 251 Olympic medals,126 gold,65 silver and 60 bronze, UCLA student-athletes competed in every Olympics since 1920 with one exception, and won a gold medal in every Olympics that the United States participated in since 1932. The State Normal School at Los Angeles opened on August 29,1882, the facility included an elementary school where teachers-in-training could practice their technique with children. That elementary school is related to the present day version, UCLA Lab School, in 1887, the school became known as the Los Angeles State Normal School. In 1914, the moved to a new campus on Vermont Avenue in East Hollywood. However, David Prescott Barrows, the new President of the University of California, the same legislation added its general undergraduate program, the College of Letters and Science. After the athletic teams entered the Pacific Coast conference in 1926, the Southern Branch student council adopted the nickname Bruins, in 1927, the Regents renamed the Southern Branch the University of California at Los Angeles. In the same year, the state broke ground in Westwood on land sold for $1 million, less than one-third its value, by real estate developers Edwin and Harold Janss, the campus in Westwood opened to students in 1929. The original four buildings were the College Library, Royce Hall, the Physics-Biology Building, the first undergraduate classes on the new campus were held in 1929 with 5,500 students. A timeline of the history can be found on its website, during its first 32 years, UCLA was treated as an off-site department of UC. As such, its presiding officer was called a provost, in 1951, UCLA was formally elevated to co-equal status with UC Berkeley, and its presiding officer Raymond B. Allen was the first chief executive to be granted the title of chancellor. The appointment of Franklin David Murphy to the position of Chancellor in 1960 helped spark an era of growth of facilities. By the end of the decade, UCLA had achieved distinction in a range of subjects

8.
Andy Smith (American football)
–
Andrew Latham Andy Smith was an American football player and coach. He served as the football coach at the University of Pennsylvania, Purdue University. As head coach of the California Golden Bears football program, Smith guided his Wonder Teams to a record of 74–16–7, captured five Pacific Coast Conference titles, Smith was the winningest football coach in school history until he was surpassed by Jeff Tedford in 2011. He was inducted into the College Football Hall of Fame in 1951, andrew Latham Smith was born in Dubois, Pennsylvania on September 10,1883. As a freshman, he played for Penn State as a fullback and he shined at his position, both fearless and dominating on the field. In two years, he was convinced to transfer to Pennsylvania, then a superior program, There, in his senior season of 1904, he was named first-team All America for the national champion Quakers. After college, he entered the workforce with a degree in chemistry, however, he returned to Penn in 1905 as the coach of the freshmen team and in 1909, when he was 26, he became the head coach of Penn. During the next four years he led Penn with a record of 30 wins,10 losses and 3 ties, following this success he switched to Purdue where during the next four years he went 12–6–3. The University of California had fielded a football team since 1886. However, in 1906 it began playing rugby instead of football and this was because by that time football became considered as dangerous sport that could lead to serious injuries. California switched back to football in 1915, this was due to the fact that by that time rule changes made the game considerably safer. Due to his reputation, Smith was recruited to come out west, in 1916, his first year at Cal, Smith posted 6 wins,4 losses and 3 ties. In 1918, Cal won its first Pacific Coast Conference championship, also in 1918 Smith hired future Cal football and basketball head coach Clarence Nibs Price as his assistant. Price had a southern California connection and was able to recruit key players to the team including Harold Brick Muller, the 1919 freshmen team went 11-1 and became the core of next years varsity squad, to be known as the Wonder Team. The 1920 Golden Bears team won all 9 games, outscored their opponents,510 to 14, the NCAA has officially recognized them as the national champion of that season, the first from the Pacific Coast. The Wonder Team at California in 1920 changed the picture of Western football. Next year the 1921 Golden Bears also finished undefeated and were invited to play in the Rose Bowl. Eventually Smith agreed to the match, with California being the overwhelming favorite, the match went nothing like it was expected

9.
USC Trojans football
–
The USC Trojans football program, established in 1888, represents the University of Southern California in college football. USC is a member of the National Collegiate Athletic Association Division I FBS, the Trojans throughout NCAA history have claimed 11 national championships. USC has the most Pro Football Hall of Famers, USC has the highest all-time post-season winning percentage of schools with 25 or more bowl appearances. The team is coached by Clay Helton, USC first fielded a football team in 1888. Playing its first game on November 14 of that year against the Alliance Athletic Club, USC faced its first collegiate opponent the following year in fall 1889, playing St. Vincents College to a 40–0 victory. In 1893, USC joined the Intercollegiate Football Association of Southern California, which was composed of USC, Occidental College, Throop Polytechnic Institute, Pomona College was invited to enter, but declined to do so. An invitation was extended to Los Angeles High School. Before they were named Trojans in 1912, USC athletic teams were called the Methodists, during the early years, limitations in travel and the scarcity of major football-playing colleges on the West Coast limited its rivalries to local Southern Californian colleges and universities. During this period USC played regular series against Occidental, Caltech, Whittier, Pomona, the first USC team to play outside of Southern California went to Stanford University on November 4,1905, where they were trampled 16–0 by the traditional West Coast powerhouse. While the teams would not meet again until 1918, this was also USCs first game against a future Pac-12 conference opponent, during this period USC also played its first games against other future Pac-12 rivals, including Oregon State, California, Oregon and Arizona. Between 1911–1913, USC followed the example of California and Stanford, the results were disastrous, as USC was soundly defeated by more experienced programs while the school itself experienced financial reverses, it was during this period that Owen R. After several decades of competition, USC first achieved prominence under head coach Gloomy Gus Henderson in the early 1920s. Another milestone came under Henderson in 1922, when USC joined the Pacific Coast Conference, success continued under coach Howard Jones from 1925 to 1940, when the Trojans were just one of a few nationally dominant teams. It was during this era that the achieved renown as the Thundering Herd. USC achieved intermittent success in the years following Jones tenure, jeff Cravath, who coached from 1942–1950, won the Rose Bowl in 1943 and 1945. Jess Hill, who coached from 1951 to 1956, won the Rose Bowl in 1953, from 1957 to 1959, the Trojans were coached by Don Clark. The Pacific Coast Conference dissolved in 1959, USC joined the conferences other three California schools and Washington to form a new conference, the Athletic Association of Western Universities, under a new charter. The program entered a new golden age upon the arrival of head coach John McKay, during this period the Trojans produced two Heisman Trophy winners and won four national championships

10.
College football
–
It was through college football play that American football rules first gained popularity in the United States. No minor league farm organizations exist in American football and it is in college football where a players performance directly impacts his chances of playing professional football. The best collegiate players will declare for the professional draft after 3 to 4 years of collegiate competition. Those not selected can still attempt to land an NFL roster spot as a free agent. Even after the emergence of the professional National Football League, college football remained extremely popular throughout the U. S, in many cases, college stadiums employ bench-style seating, as opposed to individual seats with backs and arm rests. This allows them to more fans in a given amount of space than the typical professional stadium. College athletes, unlike players in the NFL, are not permitted by the NCAA to be paid salaries, colleges are only allowed to provide non-monetary compensation such as athletic scholarships that provide for tuition, housing, and books. Modern North American football has its origins in various games, all known as football, by the 1840s, students at Rugby School were playing a game in which players were able to pick up the ball and run with it, a sport later known as Rugby football. The game was taken to Canada by British soldiers stationed there and was soon being played at Canadian colleges, the first documented gridiron football match was a game played at University College, a college of the University of Toronto, November 9,1861. One of the participants in the game involving University of Toronto students was William Mulock, a football club was formed at the university soon afterward, although its rules of play at this stage are unclear. In 1864, at Trinity College, also a college of the University of Toronto, F. Barlow Cumberland, modern Canadian football is widely regarded as having originated with a game played in Montreal, in 1865, when British Army officers played local civilians. The game gradually gained a following, and the Montreal Football Club was formed in 1868, early games appear to have had much in common with the traditional mob football played in England. The games remained largely unorganized until the 19th century, when games of football began to be played on college campuses. Each school played its own variety of football, Princeton University students played a game called ballown as early as 1820. A Harvard tradition known as Bloody Monday began in 1827, which consisted of a mass ballgame between the freshman and sophomore classes, in 1860, both the town police and the college authorities agreed the Bloody Monday had to go. The Harvard students responded by going into mourning for a figure called Football Fightum. The authorities held firm and it was a dozen years before football was again played at Harvard. Dartmouth played its own version called Old division football, the rules of which were first published in 1871, all of these games, and others, shared certain commonalities